feat: implement system settings page in dashboard

src/dashboard/mod.rs

@@ -76,6 +76,7 @@ pub fn router(state: AppState) -> Router {
         .route("/api/system/health", get(handle_system_health))
         .route("/api/system/logs", get(handle_system_logs))
         .route("/api/system/backup", post(handle_system_backup))
+        .route("/api/system/settings", get(handle_get_settings).post(handle_update_settings))
         
         .with_state(dashboard_state)
 }
@@ -686,6 +687,30 @@ async fn handle_system_backup(State(_state): State<DashboardState>) -> Json<ApiR
     })))
 }
 
+async fn handle_get_settings(State(state): State<DashboardState>) -> Json<ApiResponse<serde_json::Value>> {
+    let registry = &state.app_state.model_registry;
+    let provider_count = registry.providers.len();
+    let model_count: usize = registry.providers.values().map(|p| p.models.len()).sum();
+
+    Json(ApiResponse::success(serde_json::json!({
+        "server": {
+            "auth_tokens": state.app_state.auth_tokens,
+            "version": env!("CARGO_PKG_VERSION"),
+        },
+        "registry": {
+            "provider_count": provider_count,
+            "model_count": model_count,
+        },
+        "database": {
+            "type": "SQLite",
+        }
+    })))
+}
+
+async fn handle_update_settings(State(_state): State<DashboardState>) -> Json<ApiResponse<serde_json::Value>> {
+    Json(ApiResponse::error("Changing settings at runtime is not yet supported. Please update your config file and restart the server.".to_string()))
+}
+
 // Helper functions
 #[allow(dead_code)]
 fn mask_token(token: &str) -> String {